Device for holding the log transmitter of a boat speedometer

ABSTRACT

In a device for holding the log transmitter of boat speedometers, comprising a sleeve body arranged fixed in a perforation in the hull of the boat and having an oblong center opening, into which the log transmitter provided with a fan wheel or the like as the pulse element can be inserted and held in a detachable and watertight manner, the sleeve body ( 4 ) is provided in a watertight manner on the end facing away from the water with a head part ( 9 ) for preventing water to enter the interior of the boat. The head part has a coaxial center opening ( 10 ) connected with the oblong center opening ( 11 ) of the sleeve body ( 4 ) and having the same shape and cross sectional size as the oblong opening. The oblong and the center openings ( 11; 10 ) jointly receive the log transmitter ( 12 ) in a watertight manner, and the oblong opening ( 11 ) and the center opening ( 10 ) can be blocked and released by a blocking element ( 21 ) depending on the position of the log transmitter ( 12 ). The blocking element ( 21 ) is transversely movable and can be guided in the head part ( 9 ) in a watertight manner.

[0001] The invention relates to a device for holding the log transmitter of a boat speedometer, comprising a sleeve body with an oblong center opening arranged in a fixed manner in a perforation in the hull of the boat. The log transmitter, which is equipped with a fan wheel or the like, can be inserted in and retained in said perforation in a watertight and detachable manner.

[0002] In conjunction with a known system for measuring the speed of boats, use is made of a log transmitter that is accommodated in a sleeve body that is fixed on the boat. Said log transmitter comprises a rotating fan wheel that can be influenced by the water for generating measuring pulses that are supplied to an indicator element via electrical conductors. Furthermore, it is known that substances suspended and floating in the water in many cases influence or obstruct the motion of the fan wheel particularly after the boat has been moored for longer periods of time, so that cleaning or repair work is required. The log transmitter has to be removed from the sleeve body for such work, whereby larger amounts of water flow via the center opening into the interior of the boat while the log transmitter is being removed, and in the course of the subsequent reinstallation of the latter. Such water often can be removed only in a complicated manner.

[0003] The problem of the invention is to provide measures that prevent water from entering the interior of the boat as the log transmitter is being removed or installed or replaced.

[0004] Said problem is solved according to the invention in that the sleeve body, on which the end facing away from the water supports a head part in a watertight manner, said head part having a coaxial center opening that is connected with the oblong center opening of the sleeve body in a watertight manner and having the same shape and cross sectional size as the latter opining; that the oblong and center openings jointly receive the log transmitter in a watertight manner; and in that the oblong and center openings can be blocked or released by a blocking slide depending on the position of the log transmitter, said slide being transversely guided in a watertight manner in the head part. In this way, when the log transmitter is removed and has reached a position located above the plane of the blocking slide, the latter can be pushed into the closing position for the center openings or, when the log transmitter is subsequently inserted again and has nearly reached of the plane of the slide, the blocking slide has to be moved outwards in order to release the center openings, so that the log transmitter can be moved into the working position. Over the short duration of the movements for removing or reinserting the log transmitter, the blocking slide prevents amounts of water during said process from flowing into the interior of the boat via the oblong and center openings.

[0005] In designing the device, provision is made that the head part is directly connected with the sleeve body in a fixed, but detachable manner, or by means of a threaded ring that is provided in a fixed manner on the head part. Furthermore, provision is made that the head part has a sliding ring that is accommodated in a watertight manner with axial play against spring force in a recess disposed coaxially with the center opening, whereby said sliding ring and a plane ring body supporting another sealing ring and being held on the head part by the threaded ring jointly define the plane of the blocking slide and the top and bottom sides. The sliding ring is preferably supported in a watertight manner on a sealing ring, for example on an O-ring made of a springy, elastic material, which is arranged in the recess and delivers the spring force. Due to tensions in the sealing ring, said sealing O-ring can be displaced and held in the direction of the ring body and lifted from said position by a component acting on the sliding ring transversely in relation to the direction of movement of the blocking slide, in order to release the plane of the blocking slide. By means of the sealing ring acting on the sliding ring and the sealing ring arranged in the ring body, the blocking slide can be guided in a watertight manner in the head part in or on both sides, and water is prevented from passing by in the direction of the end of the log transmitter facing away from the fan wheel. The annular body is usefully made of any desired, for example metallic or plastic material, and provided with a groove located in the zone of the plane of the blocking slide for receiving a further sealing ring.

[0006] Furthermore, provision is made that the ring body permanently stabilizes the plane of the blocking slide vertically by means of elevations provided on the ring body, such elevations being supported on the bottom side of the head part, and is forming by such elevations additional lateral guide surfaces for guiding the blocking slide. According to a preferred embodiment, provision is made that with its bottom side, the sliding ring slightly projects under the head part, which safely assures that the sliding ring and the blocking slide can come into contact with one another for processes that seal the blocking slide.

[0007] It is possible to form the ring acting on the sliding ring in an elastic manner from any desired suitable material, preferably from a springy-elastic plastic material, for example from a foamed plastic. Rings of said type are useful if the depths of immersion of the hull of the boat are low, whereas greater depths of immersion of the hull of the boat require spring forces and sealing by means of metallic bodies, for example in the form of coil springs.

[0008] Furthermore, provision is made that in the head part, near its upper end within the zone of the center opening, a ring-shaped sealing body, in particular an O-ring is arranged in a groove enlarged by a radial widening. In the operating position, said ring rests against the log transmitter in a pressure-applying, sealing manner, and, when the log transmitter is removed from the longitudinal and center openings, first defines as a stop means for O-rings additionally arranged on the log transmitter the outer end position of the log transmitter in the head part as a type of pressure point; and, when the log transmitter is subsequently displaced further, permits complete removal of the logger by means of a pressing force than can be induced into the widening of the groove by means of one of the O-rings.

[0009] In further development of the device, provision is made that the log transmitter is connected with the head part by an axial control cam, for example in the form of a cover having a screw thread, and fixed by means of the cover in the oblong and center openings of the sleeve body and the head part. The log transmitter can be removed and installed in the device by unscrewing and removing the cover.

[0010] An alternative embodiment of the device for solving the problem according to the invention is proposed according to a further invention by the measures specified in claim 9. In said embodiment of the invention, the blocking slide displaceable into or from the blocking position is replaced by a pivot-mounted blocking element. Embodiments of the modified device are specified in claims 11 to 17.

[0011] The invention is explained in the following with the help of an exemplified embodiment shown in the drawing, in which:

[0012]FIG. 1 shows a side view of a device,

[0013]FIG. 2 is a sectional side view of a part component of a head part,

[0014]FIG. 3 is a bottom view of the part component according to FIG. 2,

[0015]FIG. 4 is a top view of a metallic ring body,

[0016]FIG. 5 is a sectional view of a ring body according to FIG. 4,

[0017]FIG. 6 is a side view of a ring-shaped seal,

[0018]FIG. 7 is a side view of a threaded ring for the head part,

[0019]FIG. 8 shows an enlarged partial section through a sliding ring,

[0020]FIG. 9 is a top view of a blocking slide,

[0021]FIG. 10 is a side view of a connecting screw,

[0022]FIG. 11 is a sectional view of a device with an alternative embodiment, and

[0023]FIG. 12 is a top view of a device according to FIG. 11.

[0024]FIG. 1 show a part piece 1 of the wall of the hull of a boat, on which the device 2 is fixed by a screw fastening 3. The device has a sleeve body 4 with the outer thread 5, which extends through an opening 6 in the wall 1 of the hull of the boat in the direction of the interior of the boat. By means of a flange 7, said sleeve body is supported on the bottom side 1′ of the wall 1 of the hull of the boat, and fixed by a threaded nut 8. A head part 9 is connected with the sleeve body 4 in a fixed manner via a treaded ring 9′. The head part 9 has a cylindrical center opening 10 that extends coaxially with an oblong center opening 11 of the sleeve body 4. The center opening 10 and the oblong opening 11 jointly serve for receiving a log transmitter 12, which is inserted in the openings 10, 11 with the use of the O-rings 12′ in a watertight manner. On its end facing away from the head part 9, the log transmitter 12 has a rotationally movable fan wheel 13 serving as the pulse transmitter for speed measurements. The log transmitter 12 is connected with an indicator device (not shown) via a cable 2′. Furthermore, the head part 9 is provided with a recess 14 (FIG. 2), which is coaxial with the center opening 10. A sliding ring 15 (FIG. 8) is guided in said recess 14 with axial play. Said sliding ring is subjected to the action of a spring force, for example the spring force exerted by a sealing ring 16 made of plastic. The sliding ring 15 rests on the sealing ring 16, which is supported on the bottom 14′ of the recess 14, and is displaceable by said sealing ring 16 in the direction of the lower end of the head part 9. Furthermore, the head part 9 is provided with a ring body 17 (FIGS. 1 and 5), which has a center opening 18 disposed coaxially with the openings 10, 11, as well as an annular groove 19 for accommodating an O-ring 20 (FIG. 5). The sliding ring 15 and the ring body 17 jointly form the plane of the blocking slide, in which a blocking slide 21 (FIG. 9) formed by a plane and prismatic, molded sheet metal part can be inserted. The plane of the blocking slide is vertically defined by the elevations 22 formed on the ring body 17 on both longitudinal sides of the blocking slide 21 (FIG. 3). With their side zones, the elevations 22 form surfaces for guiding the blocking slide 21. Furthermore, as shown in FIGS. 2 and 8, the sliding ring 15 is defined on the bottom side by an outwardly curved surface or by the slanted surfaces 15′ and an inclined inner surface 15″ of the wall. Said surfaces prevent the blocking slide 21 from impacting the sliding ring 15 in any interfering way as the blocking slide 21 is being pushed into the plane of the blocking slide. The log transmitter 12 supports a collar 23, which is fixed on the log transmitter and preferably supported in the head part 9 in a cover 29 provided with a thread 29′, with a sealing ring 29″ being mounted in between. An additional ring seal 24 in the cover 29 prevents liquid from spilling over within the head part 9.

[0025] If irregularities are noticed during speed measurements with respect to the indicated speed values, the log transmitter 12 needs to be cleaned, as a rule. For this purpose, the cover 29 has to be unscrewed and removed from the head part and pulled out of the sleeve body 4 and the head part 9 in the upward direction together with the log transmitter 12. As said components are being pulled out, the O-rings 12′ run against the O-ring 12′″, which indicates to the user that the upper end position has been reached. As the log transmitter 12 is being pulled out further, the O-rings 12′ cause the O-ring 12′″ to widen and to subsequently enter into the widening 12″. After the log transmitter 12 has exceeded the plane of the blocking slide, the center openings 10, 11 can be blocked by pushing the blocking slide 21 into the plane of the blocking slide, from the position indicated by the fully drawn line into the position shown by the dashed line (FIG. 1). In said process, the sliding ring 15 rests on the blocking slide 21, exerting pressure onto the latter, and the O-ring 20 of the ring body 17 comes to rest against the underside of the blocking slide 21 at the same time, which effects a water-tight blocking of the openings 10, 11 by means of the blocking slide 21, which is kept watertight in this way. After the log transmitter 12 has been cleaned, it has to be pushed again into the openings 10, 11 in the reverse order, whereby the blocking slide 21 has to be moved outwards shortly before the log transmitter has reached the plane of the blocking slide. Thus water is prevented from exiting from the device in either direction of movement of the log transmitter 12 by means of the blocking slide 21. At the same time, the O-ring 12′″ moves from the widening 12″ in order to come to rest against the log transmitter 12, sealing the latter. Reference numeral 27 denotes a sealing ring to be mounted between the ring body 17 and the threaded ring 9′, whereas the reference numeral 28 denotes a spherical element (FIG. 9) that can be used as a handle for the blocking slide 21, and reference numeral 30 denotes threaded screws for fixing the structural components 9′ 9, 17 of the head part on each other.

[0026] In the device shown in FIGS. 11 and 12, a sleeve body 32 provided with an outer thread 31 and having an oblong opening 39 is fixed on the wall 1 of the hull of the boat by means of a threaded nut 32′ and a flange 32″. A head part 34 is mounted in a fixed manner on the free end of the sleeve body 32 by means of a threaded ring 33. A sealing ring 36 is arranged between the sleeve body 32 and the head part 34. Furthermore, at 35, by means of screws not shown, the threaded ring 33 is connected in a fixed manner with a flange 37 provided with an O-ring 36′ inserted in an annular groove 36. A blocking element 40 provided with a passage 38 disposed concentrically in relation to the oblong opening 39 is supported on the flange 37 under spring force. The spring force is supplied in this connection by two screw springs 41 arranged diagonally in relation to each other and acting on the blocking element 40 from the top; the free abutments of said screw springs are formed by the nuts 43 mounted on the screw bolts 42, 42′, the latter being fixed on the head part. The blocking element 40 is capable of swiveling by about 75° about the screw bolt 42 acting as the axle, and is guided in this connection by the other screw bolt 42′ that engages a slide groove 44 in the blocking element 40. The flange 37 may be made of any desired material, for example from a suitable plastic or a metallic material, whereby a flange 37 made of metallic material offers the advantage that the blocking element 40 can be beveled within the zone of the edge 37′ of the opening, and that the bevel permits adaptation of the O-ring 36′ when the blocking element 40 is swiveling. The blocking element 40 is preferably formed by a plate-shaped body part 40′ with an adjoining sleeve-shaped attachment 40″, whose free end has a thread 45 to which a cover (not shown) can be screwed. The log transmitter (not shown) is capable of supporting itself with rotational mobility on the cover in a watertight manner.

[0027] For explaining the function of the device it is necessary to start from the fact that in the positions shown in FIGS. 11 and 12, the blocking element 40 is associated with the passage 38 of the opening 39″ of the flange 37 in a coaxial manner. The blocking element 40 is resting here in a pressure-exerting manner on the O-ring 36′ owing to the force of the initial tension of the two springs 41 clamped on the screw bolts 42, 42′, which prevents water from passing through within the zone of the passage 38 of the blocking element 40. The positions shown for the blocking element 40 and the flange 37 permit a log transmitter to be inserted in the center and oblong openings 31′ and 39, respectively. As shown in FIG. 12, for inserting the log transmitter, the blocking element 40 has to be turned in the anticlockwise sense of rotation, so that the passage 38 corresponds coaxially with the center opening of the sleeve body 32 (position drawn by a dashed line).

[0028] For cleaning work on the log transmitter, the log transmitter present in the oblong opening 39 and the center opening 31′ has to pulled from the device upwards and then moved in the position shown by the dashed line by swiveling the blocking element 40 down in the clockwise sense, whereby the opening 39″ can be closed due to the fact that the plane part of the blocking element extends over the opening 39″. It is understood that for reaching the closing position, no water or a minor amount of water at the most flows in the interior of the boat.

[0029] For installing the log transmitter in the device, the blocking element 40 is turned in the opposite direction, i.e. in the anticlockwise sense of rotation (FIG. 12), whereby the blocking element 40 is moved from the position shown by the dashed line back into the position indicated by the full line in FIG. 12. Again, no water will penetrate the interior of the boat because when the blocking element is swiveled back, it is retained on the O-ring 36′ in a pressed way. The free end of the sleeve-like attachment 40″ can be sealed by means of a screw-on type cover (not shown). 

1. A device for holding the log transmitter of boat speedometers, comprising a sleeve body arranged in a fixed manner in a perforation in the hull of the boat, and having an oblong center opening into which the log transmitter provided with a fan wheel or the like as the pulse member can be inserted and retained in a watertight and detachable manner, characterized in that the sleeve body (4), on its end facing away from the water, supports a head part (9) in a watertight manner, said head part having a coaxial center opening (10) that is connected watertight with the oblong center opening (11) of the sleeve body (4), and has the same shape and cross sectional size as the latter; that the oblong opening (11) and the center opening (10) jointly receive the log transmitter (12) in a watertight manner; and that the oblong opening (11) and the center opening (10) can be blocked and released by a blocking slide depending on the position of the log transmitter (12), said blocking slide being transversely movable and guided watertight in the head part (9).
 2. The device according to claim 1, characterized in that the head part (9) is connected with the sleeve body (4) in a fixed, but detachable manner by means of a threaded ring (9′) fixed on the head part.
 3. The device according to claim 1, characterized in that in a recess (14) arranged coaxially with the center opening (10), the head part (9) has a sealed sliding ring (15) having axial play against spring force, said sliding ring slightly projecting beneath the head part (9) and jointly defining with a plane ring body (17) arranged fixed on the head part (9) and supporting a sealing ring (20), the plane of the blocking slide on the top and bottom sides in a watertight manner.
 4. The device according to claim 3, characterized in that the ring body (17) is formed by any desired material and has in an annular groove (19) a sealing ring (20) defining the plane of the blocking slide.
 5. The device according to claim 3, characterized in that the sliding ring (15) is supported in a watertight manner, for example on an O-ring made of springy-elastic material, arranged on a sealing ring (16) located in the coaxial recess (14), and displaceable by the sealing ring (16) in the direction of the ring body (17), said O-ring and the ring body (17) jointly keeping the plane of separation closed; and that the sliding ring (15) is movable by a component of the plugging force of the blocking slide (21) acting on the sliding ring (15) transversely to the direction of movement of the blocking slide (21), for releasing the plane of the blocking slide.
 6. The device according to claims 3 and 5, characterized in that the sliding ring (15) is limited on the underside by an outwardly arched, curved or inclined surface (15′) and an inclined inner surface (15″).
 7. The device according to claim 1, characterized in that the log transmitter (12) can be supported in a watertight manner on the walls of the oblong and center openings (11; 10, respectively) by means of sealing rings, for example O-rings arranged fixed on the log transmitter.
 8. The device according to claim 1, characterized in that near its top end within the zone of the center opening (10), the head part (9) has a ring-shaped sealing body (12′″), in particular an O-ring inserted in a groove (12″) enlarged by a radial widening, said O-ring resting in a pressure-exerting and sealing manner against the log transmitter (12) and, when the log transmitter (12) is removed from the oblong and center openings (11 and, respectively, 10), first indicating as a stop element for the O-rings (12′) the outer end position of the log transmitter in the head part (head block), and being insertable by means of the O-rings (12′) in the widening of the groove (12″) when the log transmitter is subsequently displaced further outwards.
 9. A device for holding the log transmitter of boat speedometers, comprising a sleeve body arranged in a fixed manner in a perforation in the hull of the boat and having an oblong center opening, in which the log transmitter provided with a fan wheel or the like as the pulse transmitter can be inserted and held in a watertight and detachable manner, characterized in that on the end facing away from the water, the sleeve body (32) supports in a watertight manner a head part (34) having a center opening (31′) connected watertight with the oblong opening (39) of the sleeve body (32) and having the same shape and cross sectional size as the latter; that the oblong and the center openings (39; 31′) jointly receive the log transmitter in a watertight manner; and that the oblong opening (39) and the center opening (31′) can be blocked and released depending on the position of the log transmitter, by means of a blocking element (40) provided with a passage (38) and guided watertight and with swiveling mobility in the head part (34).
 10. The device according to claim 9, characterized in that the head part (34) is connected with the sleeve body (32) in a detachable but fixed manner by means of a threaded ring (33) fixed on the head part.
 11. The device according to claim 9, characterized in that the head part (34) comprises in a fixed manner a flange (37) extending concentrially in relation to the oblong opening (39) and the center opening (31′), and a blocking element (40) with a passage (38), said blocking element resting watertight on the flange (37) and being capable of swiveling between two end positions, whereby said passage concentrically corresponding in the one end position of the blocking element with the oblong opening (39) and the center opening (31′), and in the other end position being movable into the closing position for closing the oblong opening (39) and the center opening (31′).
 12. The device according to claim 9, characterized in that on its top side, the flange (37) has a groove (36) for receiving an O-ring (36′) serving as the sealing body; and that the blocking member (40) can be placed and guided against the O-ring (36′) in a pressure-exerting and sealing manner by means of initial spring tension.
 13. The device according to claim 12, characterized in that the initial tension of the spring can be expended by coil springs (41) supported on screw bolts (42, 42′) fixed on the head part.
 14. The device according to claim 13, characterized in that the blocking element (42) is pivot-mounted on the screw bolt (42) fixed on the head part, and receives and guides in a slide groove the other screw bolt (42′) fixed on the head part.
 15. The device according to claim 11, characterized in that the blocking element (40) is formed by a plate-shaped, molded component having a sleeve-like attachment (40″) arranged on the side facing away from the sleeve body (32). 